Double-sided aluminum substrate with prefabricated insulating holes

Abstract

The utility model relates to a double-sided aluminum substrate with prefabricated insulating holes. The problems that in the prior art, double-face wiring welding of an aluminum substrate is difficult to achieve, and the stability of a conducting hole is poor are solved. The utility model relates to a high-power LED (light-emitting diode) module, which comprises an aluminum substrate, a communicating hole is arranged on the aluminum substrate, an insulating resin structure is circumferentially covered in the communicating hole, insulating components are arranged on the upper side and the lower side of the aluminum substrate, an upper copper sheet and a lower copper sheet are respectively attached to the insulating components, and a conducting cylinder mechanism for connecting the upper copper sheet and the lower copper sheet is inserted in the communicating hole. The utility model has the advantages that double-sided wiring and double-sided welding can be realized, the communicating holes are stable in structure, the insulating effect is ensured, the conditions of plate explosion at the communicating holes and peeling of copper sheets at the upper layer and the lower layer are eliminated, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit substrates, in particular to a double-sided aluminum substrate with prefabricated insulating holes. Background Art

[0002] An aluminum substrate is a metal-based copper-clad laminate with excellent heat dissipation. Generally, a single-sided board consists of three layers: a circuit layer, an insulating layer, and a metal base layer. Multilayer boards are also used for high-end applications. These can be made by laminating an ordinary multilayer board with an insulating layer and an aluminum base. These boards are used to increase heat dissipation by placing aluminum sheets on one side or in the middle of the original printed circuit board product, thereby improving the quality and lifespan of electronic products. Existing aluminum substrates typically have a surface structure processed using traditional physical methods such as gluing, nylon brushing, ceramic brushing, or flat brushing. This structure is complex and difficult to install. Furthermore, existing aluminum substrates are difficult to achieve double-sided wiring and soldering, and the stability of the vias is poor, making them prone to board explosion and copper bulging, affecting product quality.

[0003] To address the shortcomings of existing technologies, researchers have conducted extensive research and proposed various solutions. For example, a Chinese patent document discloses an aluminum substrate [CN201610388975.5], which includes a working area machined on the upper surface of the aluminum substrate; the working area is a recessed area with a depth of 5-8 mm; fixing holes and guide post holes are machined on the upper surface outside the working area; multiple rows of processing stations are arranged within the working area; the processing stations are blind holes of size M8; a positioning hole is provided on one side of each processing station; a raised axial positioning portion is provided at the bottom of each processing station; and multiple guide post holes are also provided within the working area.

[0004] The above solution solves the problem of complex structure and difficult installation of aluminum substrates in the prior art to a certain extent, but the solution still has many shortcomings, such as: it is difficult to achieve double-sided wiring welding, and the stability of the vias is poor. Summary of the Invention

[0005] The purpose of the utility model is to provide a double-sided aluminum substrate with prefabricated insulating holes in order to solve the above problems.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a prefabricated insulating hole double-sided aluminum substrate, comprising an aluminum substrate, a connecting hole is provided on the aluminum substrate, the connecting hole is circumferentially covered with an insulating resin structure, insulating components are provided on the upper and lower sides of the aluminum substrate, an upper copper sheet and a lower copper sheet are respectively attached to the insulating components, and a conducting tube mechanism for connecting the upper copper sheet and the lower copper sheet is inserted in the connecting hole.

[0007] In the above-mentioned prefabricated double-sided aluminum substrate with insulating holes, the insulating resin structure includes insulating resin filled in the circumferential inner wall of the connecting hole, and insulating disks are provided on the upper and lower end surfaces of the aluminum substrate and located circumferentially of the connecting hole. A connecting channel that is interconnected with the connecting hole is provided on the circumferential inner side of the insulating disk.

[0008] In the above-mentioned prefabricated double-sided aluminum substrate with insulating holes, an annular overflow cavity is provided on the circumferential inner side of the insulating disk body and on the circumferential outer side of the connecting channel.

[0009] In the above-mentioned prefabricated double-sided aluminum substrate with insulating holes, an annular expansion cavity for allowing insulating resin to be squeezed into is provided inside the aluminum substrate and on the circumferential outer wall of the connecting hole.

[0010] In the above-mentioned prefabricated double-sided aluminum substrate with insulating holes, the insulating assembly includes RCC insulating layers arranged on the upper and lower sides of the aluminum substrate. A plurality of insulating seats are provided on the side of the RCC insulating layer facing the aluminum substrate, and the insulating seats are connected to the aluminum substrate through thermal conductive columns.

[0011] In the above-mentioned double-sided aluminum substrate with prefabricated insulating holes, a heat dissipation gap is formed between the aluminum substrate and the RCC insulating layer.

[0012] In the above-mentioned prefabricated insulating hole double-sided aluminum substrate, the conductive tube mechanism includes positioning through holes set on the upper copper plate and the lower copper plate, and a clearance through hole connected to the positioning through hole is provided on the RCC insulating layer, and the positioning through hole is connected to the connecting hole through the clearance through hole.

[0013] In the above-mentioned prefabricated double-sided aluminum substrate with insulating holes, a connecting mother cylinder and a connecting sub-cylinder that are threadedly connected to each other are inserted into the positioning through hole, and one end of the connecting mother cylinder and the connecting sub-cylinder are threadedly connected in the communicating hole.

[0014] In the above-mentioned prefabricated insulating hole double-sided aluminum substrate, the positioning through holes on the upper copper sheet and the lower copper sheet are circumferentially provided with annular positioning slots, and the ends of the connecting mother tube and the connecting sub-tube are provided with annular positioning parts inserted into the annular positioning slots.

[0015] In the above-mentioned prefabricated double-sided aluminum substrate with insulating holes, interconnected wire passages are provided on the inner circumferences of the connecting mother cylinder and the connecting sub-cylinder.

[0016] Compared with the existing technology, the advantages of the present invention are: stable structure, able to realize double-sided wiring and double-sided welding, stable connecting hole structure, while ensuring the insulation effect, eliminating the problem of board bursting at the connecting hole and peeling of the upper and lower copper sheets, the structural surface is smooth and flat, the actual application effect is good, and it is suitable for use in high-end double-sided board products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the insulating component and the aluminum substrate in the utility model;

[0019] Figure 3 This is a schematic diagram of the upper copper sheet structure in the utility model;

[0020] Figure 4 This is an exploded schematic diagram of the connecting mother cylinder and the connecting daughter cylinder in the present utility model;

[0021] In the figure: aluminum substrate 1, connecting hole 11, annular expansion cavity 12, insulating resin structure 2, insulating disk 21, connecting channel 22, annular overflow cavity 23, insulating component 3, RCC insulating layer 31, insulating seat 32, thermal conductive column 33, upper copper sheet 4, lower copper sheet 5, conducting tube mechanism 6, positioning through hole 61, giving way through hole 62, connecting mother tube 63, connecting sub-tube 64, annular positioning slot 65, annular positioning part 66, and wire passing channel 67. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] like Figure 1-4 As shown, a prefabricated double-sided aluminum substrate with insulating holes includes an aluminum substrate 1, a connecting hole 11 is provided on the aluminum substrate 1, and an insulating resin structure 2 is circumferentially covered in the connecting hole 11. Insulating components 3 are provided on the upper and lower sides of the aluminum substrate 1, and an upper copper sheet 4 and a lower copper sheet 5 are respectively attached to the insulating components 3. A conducting tube mechanism 6 for connecting the upper copper sheet 4 and the lower copper sheet 5 is inserted in the connecting hole 11.

[0024] Among them, the insulating resin structure 2 includes insulating resin filled in the circumferential inner wall of the connecting hole 11, and insulating disks 21 are provided on the upper and lower end surfaces of the aluminum substrate 1 and circumferentially around the connecting hole 11. A connecting channel 22 is provided on the circumferential inner side of the insulating disk 21 and is interconnected with the connecting hole 11.

[0025] The insulating resin here becomes a paste after being heated, so as to form a circumferential seal when the connecting mother cylinder 63 and the connecting child cylinder 64 are inserted and connected, and solidifies after being cooled to form an insulating seal.

[0026] It can be seen that an annular overflow chamber 23 is provided on the inner side of the insulating disc 21 and on the outer side of the connecting channel 22 .

[0027] Obviously, an annular expansion cavity 12 is provided in the aluminum substrate 1 and on the peripheral outer wall of the connection hole, into which the insulating resin can be squeezed.

[0028] The annular overflow cavity 23 and the annular expansion cavity 12 are used for insulating resin to overflow when being squeezed, so as to avoid burrs formed when being squeezed out to the outside, thereby ensuring product quality and, at the same time, expanding the insulating area of ​​the communicating hole 11 .

[0029] Furthermore, the insulating assembly 3 includes RCC insulating layers 31 provided on the upper and lower sides of the aluminum substrate 1 . A plurality of insulating seats 32 are provided on the side of the RCC insulating layer 31 facing the aluminum substrate 1 . The insulating seats 32 are connected to the aluminum substrate 1 through heat conducting columns 33 .

[0030] Furthermore, a heat dissipation gap 34 is formed between the aluminum substrate 1 and the RCC insulation layer 31 .

[0031] The insulating component 3 is mainly used to form a barrier between the aluminum substrate 1 and the upper copper sheet 4 and the lower copper sheet 5 to improve the insulation and heat insulation effect.

[0032] Specifically, the conductive tube mechanism 6 includes a positioning through hole 61 set on the upper copper sheet 4 and the lower copper sheet 5, and a clearance through hole 62 is provided on the RCC insulating layer 31 and is interconnected with the positioning through hole 61, and the positioning through hole 61 is interconnected with the connecting hole 11 through the clearance through hole 62.

[0033] In detail, a connecting mother cylinder 63 and a connecting sub-cylinder 64 which are threadedly connected to each other are inserted into the positioning through hole 61 , and one end of the connecting mother cylinder 63 and the connecting sub-cylinder 64 are threadedly connected in the communicating hole 11 .

[0034] When the connecting mother cylinder 63 and one end of the connecting sub-cylinder 64 are threadedly connected, the inner walls and outer walls of the connecting mother cylinder 63 and the connecting sub-cylinder 64 remain flush. The flush inner walls ensure that the wire passing is not obstructed, and the flush outer walls avoid the generation of sealing gaps.

[0035] Preferably, the positioning through holes 61 on the upper copper sheet 4 and the lower copper sheet 5 are circumferentially provided with an annular positioning slot 65 , and the ends of the connecting mother cylinder 63 and the connecting child cylinder 64 are provided with an annular positioning portion 66 inserted into the annular positioning slot 65 .

[0036] This arrangement can lock and position the upper copper sheet 4 and the lower copper sheet 5 and ensure the flatness of the end surfaces of the upper copper sheet 4 and the lower copper sheet 5.

[0037] In addition, a wire passage 67 communicating with each other is provided on the inner circumferential sides of the connecting mother cylinder 63 and the connecting sub-cylinder 64 .

[0038] To sum up, the principle of this embodiment is: by injecting insulating resin into the connecting hole 11 of the aluminum substrate 1, using the connecting mother cylinder 63 and the connecting sub-cylinder 64 for plug-in locking, when the connecting mother cylinder 63 and the connecting sub-cylinder 64 are inserted and connected, the insulating resin is squeezed, and the excess part overflows into the annular overflow chamber 23 and the annular expansion chamber 12, and the connecting hole 11 on the circumferential outside of the connecting mother cylinder 63 and the connecting sub-cylinder 64 is circumferentially sealed by the insulating resin, and the upper copper sheet 4 and the lower copper sheet 5 are connected by wiring through the wire channel 67 arranged on the circumferential inner side of the connecting mother cylinder 63 and the connecting sub-cylinder 64. While ensuring the insulation effect of the connecting hole 11, double-sided wiring welding is realized and the upper copper sheet 4 and the lower copper sheet 5 are fixed, thereby avoiding the explosion of the connecting hole 11 and preventing the upper copper sheet 4 and the lower copper sheet 5 from peeling. It has good stability after long-term use.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0040] Although this document frequently uses terms such as aluminum substrate 1, communicating hole 11, annular expansion cavity 12, insulating resin structure 2, insulating disk 21, connecting channel 22, annular overflow cavity 23, insulating assembly 3, RCC insulating layer 31, insulating seat 32, thermal conductive column 33, upper copper sheet 4, lower copper sheet 5, conducting tube mechanism 6, positioning through hole 61, clearance through hole 62, connecting mother tube 63, connecting child tube 64, annular positioning slot 65, annular positioning portion 66, and wire passage 67, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A prefabricated double-sided aluminum substrate with insulating holes, comprising an aluminum substrate (1), wherein the aluminum substrate (1) is provided with a connecting hole (11), characterized in that: The inner circumference of the connecting hole (11) is covered with an insulating resin structure (2); the upper and lower sides of the aluminum substrate (1) are provided with insulating components (3); the upper copper sheet (4) and the lower copper sheet (5) are respectively attached to the insulating components (3); and a conducting tube mechanism (6) for connecting the upper copper sheet (4) and the lower copper sheet (5) is inserted into the connecting hole (11).

2. The prefabricated double-sided aluminum substrate with insulating holes according to claim 1, characterized in that: The insulating resin structure (2) includes insulating resin filled in the circumferential inner wall of the connecting hole (11); insulating disks (21) are provided on the upper and lower end surfaces of the aluminum substrate (1) and are located circumferentially of the connecting hole (11); and a connecting channel (22) is provided on the circumferential inner side of the insulating disk (21) and is interconnected with the connecting hole (11).

3. The prefabricated double-sided aluminum substrate with insulating holes according to claim 2, characterized in that: An annular overflow cavity (23) is provided on the inner circumferential side of the insulating disc (21) and on the outer circumferential side of the connecting channel (22).

4. The prefabricated double-sided aluminum substrate with insulating holes according to claim 3, characterized in that: An annular expansion cavity (12) for allowing insulating resin to be squeezed into is provided in the aluminum substrate (1) and on the circumferential outer wall of the connection hole.

5. The prefabricated double-sided aluminum substrate with insulating holes according to claim 1, characterized in that: The insulating assembly (3) comprises RCC insulating layers (31) arranged on the upper and lower sides of the aluminum substrate (1); a plurality of insulating seats (32) are provided on the side of the RCC insulating layer (31) facing the aluminum substrate (1); and the insulating seats (32) are connected to the aluminum substrate (1) via heat-conducting columns (33).

6. The prefabricated double-sided aluminum substrate with insulating holes according to claim 5, characterized in that: A heat dissipation gap (34) is formed between the aluminum substrate (1) and the RCC insulation layer (31).

7. The prefabricated double-sided aluminum substrate with insulating holes according to claim 6, characterized in that: The conductive tube mechanism (6) includes a positioning through hole (61) provided on the upper copper sheet (4) and the lower copper sheet (5); a clearance through hole (62) communicating with the positioning through hole (61) is provided on the RCC insulating layer (31); and the positioning through hole (61) is communicated with the communication hole (11) via the clearance through hole (62).

8. The prefabricated double-sided aluminum substrate with insulating holes according to claim 7, characterized in that: A connecting mother cylinder (63) and a connecting sub cylinder (64) which are threadedly connected to each other are inserted into the positioning through hole (61), and one end of the connecting mother cylinder (63) and the connecting sub cylinder (64) are threadedly connected in the communicating hole (11).

9. The prefabricated double-sided aluminum substrate with insulating holes according to claim 8, characterized in that: The positioning through holes (61) on the upper copper sheet (4) and the lower copper sheet (5) are circumferentially provided with annular positioning slots (65), and the ends of the connecting mother tube (63) and the connecting child tube (64) are provided with annular positioning portions (66) inserted into the annular positioning slots (65).

10. The prefabricated double-sided aluminum substrate with insulating holes according to claim 9, characterized in that: The connecting mother cylinder (63) and the connecting sub-cylinder (64) are provided with mutually communicating wire passages (67) on the inner circumferential sides.

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